/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem03_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 10:12:22,630 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 10:12:22,633 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 10:12:22,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 10:12:22,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 10:12:22,670 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 10:12:22,672 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 10:12:22,674 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 10:12:22,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 10:12:22,678 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 10:12:22,679 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 10:12:22,680 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 10:12:22,681 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 10:12:22,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 10:12:22,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 10:12:22,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 10:12:22,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 10:12:22,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 10:12:22,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 10:12:22,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 10:12:22,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 10:12:22,695 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 10:12:22,697 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 10:12:22,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 10:12:22,712 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 10:12:22,713 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 10:12:22,713 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 10:12:22,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 10:12:22,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 10:12:22,716 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 10:12:22,717 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 10:12:22,718 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 10:12:22,719 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 10:12:22,720 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 10:12:22,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 10:12:22,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 10:12:22,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 10:12:22,728 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 10:12:22,729 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 10:12:22,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 10:12:22,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 10:12:22,734 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 10:12:22,788 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 10:12:22,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 10:12:22,791 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 10:12:22,791 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 10:12:22,792 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 10:12:22,794 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 10:12:22,794 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 10:12:22,794 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 10:12:22,795 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 10:12:22,795 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 10:12:22,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 10:12:22,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 10:12:22,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 10:12:22,797 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 10:12:22,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 10:12:22,797 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 10:12:22,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 10:12:22,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 10:12:22,798 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 10:12:22,798 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 10:12:22,798 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 10:12:22,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:12:22,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 10:12:22,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 10:12:22,800 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 10:12:22,800 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 10:12:22,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 10:12:22,800 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 10:12:22,800 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 10:12:22,800 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 10:12:23,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 10:12:23,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 10:12:23,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 10:12:23,294 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 10:12:23,296 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 10:12:23,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label12.c [2020-10-28 10:12:23,376 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0bcb9a9c/c937d42b167b46028dc10c602c70c71d/FLAGaf97fb888 [2020-10-28 10:12:24,399 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 10:12:24,400 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem03_label12.c [2020-10-28 10:12:24,431 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0bcb9a9c/c937d42b167b46028dc10c602c70c71d/FLAGaf97fb888 [2020-10-28 10:12:24,932 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d0bcb9a9c/c937d42b167b46028dc10c602c70c71d [2020-10-28 10:12:24,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 10:12:24,948 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 10:12:24,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 10:12:24,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 10:12:24,955 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 10:12:24,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:12:24" (1/1) ... [2020-10-28 10:12:24,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63ccacbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:24, skipping insertion in model container [2020-10-28 10:12:24,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 10:12:24" (1/1) ... [2020-10-28 10:12:24,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 10:12:25,072 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 10:12:25,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:12:25,939 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 10:12:26,173 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 10:12:26,195 INFO L208 MainTranslator]: Completed translation [2020-10-28 10:12:26,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:26 WrapperNode [2020-10-28 10:12:26,196 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 10:12:26,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 10:12:26,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 10:12:26,223 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 10:12:26,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:26" (1/1) ... [2020-10-28 10:12:26,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:26" (1/1) ... [2020-10-28 10:12:26,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:26" (1/1) ... [2020-10-28 10:12:26,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:26" (1/1) ... [2020-10-28 10:12:26,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:26" (1/1) ... [2020-10-28 10:12:26,386 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:26" (1/1) ... [2020-10-28 10:12:26,398 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:26" (1/1) ... [2020-10-28 10:12:26,412 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 10:12:26,413 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 10:12:26,413 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 10:12:26,413 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 10:12:26,414 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 10:12:26,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 10:12:26,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 10:12:26,504 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 10:12:26,504 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-28 10:12:26,504 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 10:12:26,504 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-28 10:12:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 10:12:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 10:12:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 10:12:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 10:12:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 10:12:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 10:12:26,505 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 10:12:26,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 10:12:26,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 10:12:26,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 10:12:26,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 10:12:26,506 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 10:12:26,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 10:12:29,167 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 10:12:29,167 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 10:12:29,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:12:29 BoogieIcfgContainer [2020-10-28 10:12:29,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 10:12:29,172 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 10:12:29,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 10:12:29,176 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 10:12:29,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 10:12:24" (1/3) ... [2020-10-28 10:12:29,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f778674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:12:29, skipping insertion in model container [2020-10-28 10:12:29,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 10:12:26" (2/3) ... [2020-10-28 10:12:29,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f778674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 10:12:29, skipping insertion in model container [2020-10-28 10:12:29,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 10:12:29" (3/3) ... [2020-10-28 10:12:29,179 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label12.c [2020-10-28 10:12:29,192 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 10:12:29,198 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 10:12:29,212 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 10:12:29,242 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 10:12:29,242 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 10:12:29,242 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 10:12:29,243 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 10:12:29,243 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 10:12:29,243 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 10:12:29,243 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 10:12:29,243 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 10:12:29,267 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states. [2020-10-28 10:12:29,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-28 10:12:29,307 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:12:29,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:12:29,309 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:12:29,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:12:29,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1754186376, now seen corresponding path program 1 times [2020-10-28 10:12:29,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:12:29,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480801680] [2020-10-28 10:12:29,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:12:29,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:29,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:30,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:34,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:34,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-28 10:12:34,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:12:34,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-28 10:12:34,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:34,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:34,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:12:34,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:12:34,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-10-28 10:12:34,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 10:12:35,631 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:12:35,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:12:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:35,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:35,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:35,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:12:35,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:35,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-10-28 10:12:35,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:35,706 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:35,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:35,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:35,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:12:35,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:35,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:12:35,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480801680] [2020-10-28 10:12:35,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 10:12:35,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 10:12:35,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131256183] [2020-10-28 10:12:35,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 10:12:35,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:12:35,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 10:12:35,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 10:12:35,831 INFO L87 Difference]: Start difference. First operand 315 states. Second operand 4 states. [2020-10-28 10:12:36,309 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:12:39,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:12:39,813 INFO L93 Difference]: Finished difference Result 889 states and 1542 transitions. [2020-10-28 10:12:39,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:12:39,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 170 [2020-10-28 10:12:39,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:12:39,838 INFO L225 Difference]: With dead ends: 889 [2020-10-28 10:12:39,838 INFO L226 Difference]: Without dead ends: 481 [2020-10-28 10:12:39,846 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:12:39,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-10-28 10:12:39,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 476. [2020-10-28 10:12:39,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2020-10-28 10:12:39,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 729 transitions. [2020-10-28 10:12:39,968 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 729 transitions. Word has length 170 [2020-10-28 10:12:39,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:12:39,971 INFO L481 AbstractCegarLoop]: Abstraction has 476 states and 729 transitions. [2020-10-28 10:12:39,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 10:12:39,972 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 729 transitions. [2020-10-28 10:12:39,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-28 10:12:39,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:12:39,983 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:12:39,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 10:12:39,988 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:12:39,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:12:39,989 INFO L82 PathProgramCache]: Analyzing trace with hash 114532969, now seen corresponding path program 1 times [2020-10-28 10:12:39,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:12:39,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450846010] [2020-10-28 10:12:39,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:12:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:40,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:40,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:42,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:42,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-28 10:12:42,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:12:42,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2156 [2020-10-28 10:12:42,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:42,209 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:42,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:12:42,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 10:12:42,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-28 10:12:42,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:42,639 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:12:42,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:12:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:42,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:42,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:42,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:12:42,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:42,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 10:12:42,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:42,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:42,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:12:42,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:42,663 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:12:42,663 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:42,803 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:12:42,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:12:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:42,813 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:42,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:42,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 10:12:42,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:42,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 10:12:42,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:42,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:42,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:42,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:42,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 10:12:42,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:42,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:12:42,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450846010] [2020-10-28 10:12:42,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:12:42,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:12:42,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534660099] [2020-10-28 10:12:42,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:12:42,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:12:42,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:12:42,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:12:42,929 INFO L87 Difference]: Start difference. First operand 476 states and 729 transitions. Second operand 5 states. [2020-10-28 10:12:43,335 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:12:46,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:12:46,810 INFO L93 Difference]: Finished difference Result 1384 states and 2149 transitions. [2020-10-28 10:12:46,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:12:46,812 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 179 [2020-10-28 10:12:46,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:12:46,826 INFO L225 Difference]: With dead ends: 1384 [2020-10-28 10:12:46,826 INFO L226 Difference]: Without dead ends: 914 [2020-10-28 10:12:46,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:12:46,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2020-10-28 10:12:46,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 903. [2020-10-28 10:12:46,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 903 states. [2020-10-28 10:12:46,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1331 transitions. [2020-10-28 10:12:46,913 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1331 transitions. Word has length 179 [2020-10-28 10:12:46,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:12:46,915 INFO L481 AbstractCegarLoop]: Abstraction has 903 states and 1331 transitions. [2020-10-28 10:12:46,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:12:46,916 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1331 transitions. [2020-10-28 10:12:46,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-28 10:12:46,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:12:46,928 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:12:46,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 10:12:46,928 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:12:46,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:12:46,932 INFO L82 PathProgramCache]: Analyzing trace with hash -545512683, now seen corresponding path program 1 times [2020-10-28 10:12:46,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:12:46,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809903223] [2020-10-28 10:12:46,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:12:46,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:47,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:47,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:47,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:47,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:47,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:49,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:49,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:50,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:52,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:52,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-28 10:12:52,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 10:12:52,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-28 10:12:52,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:52,074 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:52,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:52,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-28 10:12:52,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-28 10:12:52,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:12:52,502 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:12:52,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:12:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:52,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:52,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:52,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:12:52,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:52,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 10:12:52,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:52,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:52,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:12:52,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:52,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:12:52,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:52,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:12:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:52,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:52,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:52,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 10:12:52,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:52,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 10:12:52,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:52,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:52,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:12:52,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:52,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:12:52,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:12:52,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 10:12:52,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:52,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:52,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:52,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:52,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 10:12:52,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:12:52,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 10:12:52,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:52,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:52,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:52,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:52,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 10:12:52,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 10:12:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 10:12:52,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809903223] [2020-10-28 10:12:52,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:12:52,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:12:52,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809387318] [2020-10-28 10:12:52,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:12:52,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:12:52,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:12:52,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:12:52,782 INFO L87 Difference]: Start difference. First operand 903 states and 1331 transitions. Second operand 5 states. [2020-10-28 10:12:53,439 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:12:56,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:12:56,551 INFO L93 Difference]: Finished difference Result 2646 states and 3932 transitions. [2020-10-28 10:12:56,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:12:56,553 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 189 [2020-10-28 10:12:56,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:12:56,566 INFO L225 Difference]: With dead ends: 2646 [2020-10-28 10:12:56,566 INFO L226 Difference]: Without dead ends: 906 [2020-10-28 10:12:56,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:12:56,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-10-28 10:12:56,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 902. [2020-10-28 10:12:56,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 902 states. [2020-10-28 10:12:56,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1329 transitions. [2020-10-28 10:12:56,622 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1329 transitions. Word has length 189 [2020-10-28 10:12:56,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:12:56,623 INFO L481 AbstractCegarLoop]: Abstraction has 902 states and 1329 transitions. [2020-10-28 10:12:56,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:12:56,623 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1329 transitions. [2020-10-28 10:12:56,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-28 10:12:56,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:12:56,628 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:12:56,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 10:12:56,628 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:12:56,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:12:56,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1687857941, now seen corresponding path program 1 times [2020-10-28 10:12:56,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:12:56,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380659861] [2020-10-28 10:12:56,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:12:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:56,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:57,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:58,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:58,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:58,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-28 10:12:58,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:12:58,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2316 [2020-10-28 10:12:58,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:58,988 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:58,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:12:58,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 10:12:58,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-28 10:12:58,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 10:12:59,359 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:12:59,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:12:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:59,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:59,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:59,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:12:59,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:59,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:12:59,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:59,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:59,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:12:59,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:59,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:12:59,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:12:59,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:12:59,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:12:59,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:12:59,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:12:59,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 10:12:59,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:12:59,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 10:12:59,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:12:59,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:12:59,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:12:59,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:12:59,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 10:12:59,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:12:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 10:12:59,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380659861] [2020-10-28 10:12:59,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:12:59,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:12:59,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315863375] [2020-10-28 10:12:59,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:12:59,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:12:59,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:12:59,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:12:59,611 INFO L87 Difference]: Start difference. First operand 902 states and 1329 transitions. Second operand 5 states. [2020-10-28 10:12:59,981 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:13:03,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:13:03,222 INFO L93 Difference]: Finished difference Result 2642 states and 3959 transitions. [2020-10-28 10:13:03,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:13:03,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 189 [2020-10-28 10:13:03,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:13:03,234 INFO L225 Difference]: With dead ends: 2642 [2020-10-28 10:13:03,235 INFO L226 Difference]: Without dead ends: 1746 [2020-10-28 10:13:03,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:13:03,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2020-10-28 10:13:03,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1739. [2020-10-28 10:13:03,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1739 states. [2020-10-28 10:13:03,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1739 states to 1739 states and 2534 transitions. [2020-10-28 10:13:03,301 INFO L78 Accepts]: Start accepts. Automaton has 1739 states and 2534 transitions. Word has length 189 [2020-10-28 10:13:03,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:13:03,302 INFO L481 AbstractCegarLoop]: Abstraction has 1739 states and 2534 transitions. [2020-10-28 10:13:03,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:13:03,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1739 states and 2534 transitions. [2020-10-28 10:13:03,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-28 10:13:03,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:03,309 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:13:03,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 10:13:03,310 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:03,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:03,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1184780900, now seen corresponding path program 1 times [2020-10-28 10:13:03,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:03,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405422248] [2020-10-28 10:13:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:03,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:03,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:04,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:07,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:08,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:08,420 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 216 [2020-10-28 10:13:08,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:13:08,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5064 [2020-10-28 10:13:08,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:08,421 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:08,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:13:08,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 10:13:08,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 193 [2020-10-28 10:13:08,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 10:13:08,819 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:08,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:08,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:08,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:08,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:08,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:08,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 10:13:08,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:08,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:08,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:08,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:08,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:08,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 10:13:08,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:08,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:08,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:08,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:08,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 10:13:08,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:08,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 10:13:08,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:08,970 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:08,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:08,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:08,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 10:13:08,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:08,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-10-28 10:13:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:08,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:09,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:09,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:09,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 10:13:09,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:13:09,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 120 [2020-10-28 10:13:09,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:09,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:09,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:09,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:13:09,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 10:13:09,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 10:13:09,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405422248] [2020-10-28 10:13:09,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:13:09,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:13:09,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458126255] [2020-10-28 10:13:09,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:13:09,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:09,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:13:09,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:13:09,247 INFO L87 Difference]: Start difference. First operand 1739 states and 2534 transitions. Second operand 7 states. [2020-10-28 10:13:09,699 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:13:09,994 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:13:16,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:13:16,126 INFO L93 Difference]: Finished difference Result 7008 states and 11253 transitions. [2020-10-28 10:13:16,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:13:16,127 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 202 [2020-10-28 10:13:16,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:13:16,197 INFO L225 Difference]: With dead ends: 7008 [2020-10-28 10:13:16,198 INFO L226 Difference]: Without dead ends: 5275 [2020-10-28 10:13:16,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:13:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5275 states. [2020-10-28 10:13:16,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5275 to 5175. [2020-10-28 10:13:16,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5175 states. [2020-10-28 10:13:16,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5175 states to 5175 states and 7423 transitions. [2020-10-28 10:13:16,448 INFO L78 Accepts]: Start accepts. Automaton has 5175 states and 7423 transitions. Word has length 202 [2020-10-28 10:13:16,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:13:16,449 INFO L481 AbstractCegarLoop]: Abstraction has 5175 states and 7423 transitions. [2020-10-28 10:13:16,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:13:16,449 INFO L276 IsEmpty]: Start isEmpty. Operand 5175 states and 7423 transitions. [2020-10-28 10:13:16,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-28 10:13:16,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:16,468 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:13:16,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 10:13:16,468 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:16,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:16,469 INFO L82 PathProgramCache]: Analyzing trace with hash -549922182, now seen corresponding path program 1 times [2020-10-28 10:13:16,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:16,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708983363] [2020-10-28 10:13:16,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:16,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:16,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:18,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:18,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:21,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:21,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-28 10:13:21,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:13:21,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-28 10:13:21,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:21,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:21,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:21,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-28 10:13:21,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-28 10:13:21,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:21,899 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:21,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:21,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:21,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:21,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:21,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:21,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 10:13:21,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:21,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:21,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:21,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:21,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:21,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:22,097 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:13:22,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:22,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:22,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:22,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 10:13:22,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:22,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 10:13:22,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:22,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:22,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:22,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:22,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 10:13:22,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:22,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:22,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:22,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 10:13:22,196 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:22,196 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-28 10:13:22,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:22,197 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:22,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:22,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:22,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:13:22,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:22,305 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 10:13:22,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708983363] [2020-10-28 10:13:22,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:13:22,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 10:13:22,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88791325] [2020-10-28 10:13:22,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 10:13:22,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:22,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 10:13:22,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 10:13:22,307 INFO L87 Difference]: Start difference. First operand 5175 states and 7423 transitions. Second operand 5 states. [2020-10-28 10:13:22,614 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:13:25,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:13:25,588 INFO L93 Difference]: Finished difference Result 12454 states and 18203 transitions. [2020-10-28 10:13:25,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:13:25,589 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 211 [2020-10-28 10:13:25,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:13:25,629 INFO L225 Difference]: With dead ends: 12454 [2020-10-28 10:13:25,629 INFO L226 Difference]: Without dead ends: 7285 [2020-10-28 10:13:25,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:13:25,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7285 states. [2020-10-28 10:13:25,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7285 to 7283. [2020-10-28 10:13:25,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7283 states. [2020-10-28 10:13:25,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7283 states to 7283 states and 9792 transitions. [2020-10-28 10:13:25,923 INFO L78 Accepts]: Start accepts. Automaton has 7283 states and 9792 transitions. Word has length 211 [2020-10-28 10:13:25,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:13:25,923 INFO L481 AbstractCegarLoop]: Abstraction has 7283 states and 9792 transitions. [2020-10-28 10:13:25,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 10:13:25,924 INFO L276 IsEmpty]: Start isEmpty. Operand 7283 states and 9792 transitions. [2020-10-28 10:13:25,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-28 10:13:25,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:25,943 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:13:25,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 10:13:25,944 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:25,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:25,944 INFO L82 PathProgramCache]: Analyzing trace with hash -560687246, now seen corresponding path program 1 times [2020-10-28 10:13:25,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:25,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [540587732] [2020-10-28 10:13:25,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:25,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:26,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:27,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:28,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:28,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:31,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:31,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-28 10:13:31,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 10:13:31,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-28 10:13:31,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:31,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:31,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 10:13:31,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:13:31,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-28 10:13:31,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:31,503 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:31,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:31,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:31,538 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:31,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:31,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:31,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 10:13:31,539 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:31,539 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:31,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:31,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:31,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:13:31,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:31,658 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:13:31,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:31,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:31,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:31,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:31,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:13:31,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:13:31,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 10:13:31,688 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:31,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:31,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:31,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:31,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 10:13:31,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:31,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:13:31,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:31,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:31,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:31,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 10:13:31,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:31,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-28 10:13:31,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:31,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:31,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 10:13:31,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:31,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 10:13:31,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:32,078 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 10:13:32,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [540587732] [2020-10-28 10:13:32,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:13:32,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:13:32,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166841014] [2020-10-28 10:13:32,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:13:32,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:32,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:13:32,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:13:32,080 INFO L87 Difference]: Start difference. First operand 7283 states and 9792 transitions. Second operand 7 states. [2020-10-28 10:13:32,349 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:13:33,268 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-28 10:13:36,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:13:36,266 INFO L93 Difference]: Finished difference Result 12766 states and 17497 transitions. [2020-10-28 10:13:36,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 10:13:36,267 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 219 [2020-10-28 10:13:36,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:13:36,306 INFO L225 Difference]: With dead ends: 12766 [2020-10-28 10:13:36,306 INFO L226 Difference]: Without dead ends: 7553 [2020-10-28 10:13:36,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 10:13:36,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7553 states. [2020-10-28 10:13:36,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7553 to 7551. [2020-10-28 10:13:36,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7551 states. [2020-10-28 10:13:36,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7551 states to 7551 states and 10080 transitions. [2020-10-28 10:13:36,577 INFO L78 Accepts]: Start accepts. Automaton has 7551 states and 10080 transitions. Word has length 219 [2020-10-28 10:13:36,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:13:36,578 INFO L481 AbstractCegarLoop]: Abstraction has 7551 states and 10080 transitions. [2020-10-28 10:13:36,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:13:36,578 INFO L276 IsEmpty]: Start isEmpty. Operand 7551 states and 10080 transitions. [2020-10-28 10:13:36,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-10-28 10:13:36,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:36,603 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:13:36,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 10:13:36,603 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:36,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:36,604 INFO L82 PathProgramCache]: Analyzing trace with hash 511699404, now seen corresponding path program 1 times [2020-10-28 10:13:36,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:36,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404270384] [2020-10-28 10:13:36,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:36,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:36,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:40,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:40,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:41,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:41,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 254 [2020-10-28 10:13:41,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:13:41,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4688 [2020-10-28 10:13:41,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:41,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:41,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:41,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 10:13:41,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 10:13:41,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:41,646 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:41,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:41,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:41,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:41,662 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:41,662 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:41,662 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 10:13:41,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:41,662 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:41,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:13:41,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:41,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:13:41,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:41,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:41,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:41,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:41,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:13:41,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:41,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 10:13:41,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:41,804 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:41,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:41,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:41,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 10:13:41,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:41,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:13:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:41,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:42,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:42,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 10:13:42,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:42,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-28 10:13:42,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:42,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:42,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:13:42,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:13:42,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 10:13:42,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:42,223 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 73 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:13:42,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404270384] [2020-10-28 10:13:42,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:13:42,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:13:42,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890326927] [2020-10-28 10:13:42,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:13:42,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:42,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:13:42,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:13:42,226 INFO L87 Difference]: Start difference. First operand 7551 states and 10080 transitions. Second operand 7 states. [2020-10-28 10:13:42,641 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:13:45,001 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:13:49,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:13:49,018 INFO L93 Difference]: Finished difference Result 22110 states and 32044 transitions. [2020-10-28 10:13:49,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:13:49,019 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 240 [2020-10-28 10:13:49,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:13:49,098 INFO L225 Difference]: With dead ends: 22110 [2020-10-28 10:13:49,099 INFO L226 Difference]: Without dead ends: 14573 [2020-10-28 10:13:49,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:13:49,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14573 states. [2020-10-28 10:13:49,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14573 to 13880. [2020-10-28 10:13:49,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13880 states. [2020-10-28 10:13:49,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13880 states to 13880 states and 18067 transitions. [2020-10-28 10:13:49,644 INFO L78 Accepts]: Start accepts. Automaton has 13880 states and 18067 transitions. Word has length 240 [2020-10-28 10:13:49,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:13:49,645 INFO L481 AbstractCegarLoop]: Abstraction has 13880 states and 18067 transitions. [2020-10-28 10:13:49,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:13:49,645 INFO L276 IsEmpty]: Start isEmpty. Operand 13880 states and 18067 transitions. [2020-10-28 10:13:49,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-28 10:13:49,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:13:49,686 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:13:49,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 10:13:49,686 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:13:49,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:13:49,687 INFO L82 PathProgramCache]: Analyzing trace with hash -679552595, now seen corresponding path program 1 times [2020-10-28 10:13:49,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:13:49,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362904627] [2020-10-28 10:13:49,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:13:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:49,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:49,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:51,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:52,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:53,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:53,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:54,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:54,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-28 10:13:54,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 10:13:54,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 10:13:54,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:54,745 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:54,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 10:13:54,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:13:54,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 256 [2020-10-28 10:13:54,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:55,394 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:13:55,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:13:55,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:55,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:55,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:55,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:13:55,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:13:55,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 10:13:55,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:55,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:55,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:55,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:55,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:13:55,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:55,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:13:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:55,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:55,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:55,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:55,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:13:55,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:13:55,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-10-28 10:13:55,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:55,587 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:55,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:13:55,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:55,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 10:13:55,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:55,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:13:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:13:55,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:55,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:13:55,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:13:55,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 10:13:55,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 10:13:55,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-28 10:13:55,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:13:55,912 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:13:55,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 10:13:55,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:13:55,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 10:13:55,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:13:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 10:13:56,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362904627] [2020-10-28 10:13:56,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:13:56,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:13:56,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945613504] [2020-10-28 10:13:56,314 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:13:56,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:13:56,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:13:56,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:13:56,315 INFO L87 Difference]: Start difference. First operand 13880 states and 18067 transitions. Second operand 7 states. [2020-10-28 10:13:56,580 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:13:58,059 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-28 10:14:00,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:00,476 INFO L93 Difference]: Finished difference Result 24053 states and 31580 transitions. [2020-10-28 10:14:00,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 10:14:00,477 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 259 [2020-10-28 10:14:00,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:00,530 INFO L225 Difference]: With dead ends: 24053 [2020-10-28 10:14:00,530 INFO L226 Difference]: Without dead ends: 13959 [2020-10-28 10:14:00,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 10:14:00,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13959 states. [2020-10-28 10:14:00,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13959 to 13949. [2020-10-28 10:14:00,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13949 states. [2020-10-28 10:14:00,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13949 states to 13949 states and 18158 transitions. [2020-10-28 10:14:00,928 INFO L78 Accepts]: Start accepts. Automaton has 13949 states and 18158 transitions. Word has length 259 [2020-10-28 10:14:00,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:00,929 INFO L481 AbstractCegarLoop]: Abstraction has 13949 states and 18158 transitions. [2020-10-28 10:14:00,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:14:00,929 INFO L276 IsEmpty]: Start isEmpty. Operand 13949 states and 18158 transitions. [2020-10-28 10:14:00,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-28 10:14:00,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:00,971 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:14:00,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 10:14:00,972 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:00,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:00,973 INFO L82 PathProgramCache]: Analyzing trace with hash -34498155, now seen corresponding path program 1 times [2020-10-28 10:14:00,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:00,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818310602] [2020-10-28 10:14:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:01,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:01,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:01,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:02,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:06,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:06,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 280 [2020-10-28 10:14:06,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:14:06,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-28 10:14:06,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:06,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:06,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:06,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 10:14:06,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 10:14:06,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:06,335 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:06,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:06,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:06,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:06,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:06,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:06,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 10:14:06,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:06,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:06,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:06,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:06,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:06,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:06,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:06,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:06,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:06,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:14:06,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:06,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 10:14:06,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:06,469 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:06,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:06,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:06,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:06,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:06,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:14:06,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:06,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:06,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:06,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 10:14:06,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:06,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 10:14:06,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:06,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:06,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:06,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:06,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 10:14:06,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:06,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 10:14:06,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:06,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:06,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:06,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 10:14:06,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:06,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-28 10:14:06,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:06,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:06,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:06,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:06,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 10:14:06,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:06,827 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 10:14:06,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818310602] [2020-10-28 10:14:06,828 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:06,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:14:06,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143101905] [2020-10-28 10:14:06,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:14:06,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:06,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:14:06,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:14:06,832 INFO L87 Difference]: Start difference. First operand 13949 states and 18158 transitions. Second operand 7 states. [2020-10-28 10:14:07,085 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:14:10,527 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:14:11,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:11,295 INFO L93 Difference]: Finished difference Result 27983 states and 37037 transitions. [2020-10-28 10:14:11,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 10:14:11,296 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 264 [2020-10-28 10:14:11,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:11,359 INFO L225 Difference]: With dead ends: 27983 [2020-10-28 10:14:11,360 INFO L226 Difference]: Without dead ends: 14724 [2020-10-28 10:14:11,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:14:11,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14724 states. [2020-10-28 10:14:11,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14724 to 14604. [2020-10-28 10:14:11,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14604 states. [2020-10-28 10:14:11,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14604 states to 14604 states and 18257 transitions. [2020-10-28 10:14:11,792 INFO L78 Accepts]: Start accepts. Automaton has 14604 states and 18257 transitions. Word has length 264 [2020-10-28 10:14:11,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:11,793 INFO L481 AbstractCegarLoop]: Abstraction has 14604 states and 18257 transitions. [2020-10-28 10:14:11,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:14:11,793 INFO L276 IsEmpty]: Start isEmpty. Operand 14604 states and 18257 transitions. [2020-10-28 10:14:11,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-28 10:14:11,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:11,829 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:14:11,829 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 10:14:11,829 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:11,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:11,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1544480266, now seen corresponding path program 1 times [2020-10-28 10:14:11,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:11,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055604742] [2020-10-28 10:14:11,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:11,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:11,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:12,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:13,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:14,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:14,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 277 [2020-10-28 10:14:14,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:14:14,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2457 [2020-10-28 10:14:14,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:14,364 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:14,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:14,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 10:14:14,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 10:14:14,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:14,654 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:14,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:14,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:14,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:14,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:14,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:14,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:14:14,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:14,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:14,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:14,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:14,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:14,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:14,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:14,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:14,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:14,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:14,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 10:14:14,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:14,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-28 10:14:14,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:14,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:14,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:14,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:14,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 10:14:14,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:14,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 10:14:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:14,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:15,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:15,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 10:14:15,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:15,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-28 10:14:15,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:15,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:15,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:15,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:15,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 10:14:15,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:14:15,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055604742] [2020-10-28 10:14:15,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:15,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 10:14:15,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168034547] [2020-10-28 10:14:15,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 10:14:15,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:15,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 10:14:15,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:14:15,187 INFO L87 Difference]: Start difference. First operand 14604 states and 18257 transitions. Second operand 8 states. [2020-10-28 10:14:15,464 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:14:15,873 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 10:14:16,604 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 10:14:20,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:20,845 INFO L93 Difference]: Finished difference Result 35469 states and 44642 transitions. [2020-10-28 10:14:20,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 10:14:20,846 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 263 [2020-10-28 10:14:20,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:20,912 INFO L225 Difference]: With dead ends: 35469 [2020-10-28 10:14:20,912 INFO L226 Difference]: Without dead ends: 21602 [2020-10-28 10:14:20,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-28 10:14:20,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21602 states. [2020-10-28 10:14:21,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21602 to 21465. [2020-10-28 10:14:21,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21465 states. [2020-10-28 10:14:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21465 states to 21465 states and 26060 transitions. [2020-10-28 10:14:21,424 INFO L78 Accepts]: Start accepts. Automaton has 21465 states and 26060 transitions. Word has length 263 [2020-10-28 10:14:21,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:21,425 INFO L481 AbstractCegarLoop]: Abstraction has 21465 states and 26060 transitions. [2020-10-28 10:14:21,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 10:14:21,425 INFO L276 IsEmpty]: Start isEmpty. Operand 21465 states and 26060 transitions. [2020-10-28 10:14:21,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-28 10:14:21,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:21,460 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:14:21,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 10:14:21,460 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:21,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:21,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1520719433, now seen corresponding path program 1 times [2020-10-28 10:14:21,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:21,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725321649] [2020-10-28 10:14:21,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:21,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:21,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:22,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:25,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:25,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 293 [2020-10-28 10:14:25,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:14:25,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3640 [2020-10-28 10:14:25,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:25,144 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:25,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:25,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 10:14:25,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-28 10:14:25,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:25,446 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:25,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:25,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:25,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:25,462 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:25,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:25,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 10:14:25,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:25,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:25,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:25,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:25,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:25,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:25,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:25,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:25,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:25,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:14:25,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:25,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 10:14:25,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:25,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:25,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:25,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:25,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 10:14:25,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:25,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:14:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:25,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:25,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:25,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 10:14:25,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:25,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-28 10:14:25,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:25,825 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:25,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:25,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:25,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-28 10:14:25,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:26,298 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 10:14:26,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725321649] [2020-10-28 10:14:26,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:26,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:14:26,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913537008] [2020-10-28 10:14:26,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:14:26,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:26,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:14:26,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:14:26,302 INFO L87 Difference]: Start difference. First operand 21465 states and 26060 transitions. Second operand 7 states. [2020-10-28 10:14:26,584 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:14:28,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:28,812 INFO L93 Difference]: Finished difference Result 39022 states and 47535 transitions. [2020-10-28 10:14:28,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 10:14:28,812 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 279 [2020-10-28 10:14:28,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:28,871 INFO L225 Difference]: With dead ends: 39022 [2020-10-28 10:14:28,871 INFO L226 Difference]: Without dead ends: 18290 [2020-10-28 10:14:28,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:14:28,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18290 states. [2020-10-28 10:14:29,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18290 to 18268. [2020-10-28 10:14:29,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18268 states. [2020-10-28 10:14:29,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18268 states to 18268 states and 21919 transitions. [2020-10-28 10:14:29,370 INFO L78 Accepts]: Start accepts. Automaton has 18268 states and 21919 transitions. Word has length 279 [2020-10-28 10:14:29,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:29,370 INFO L481 AbstractCegarLoop]: Abstraction has 18268 states and 21919 transitions. [2020-10-28 10:14:29,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:14:29,371 INFO L276 IsEmpty]: Start isEmpty. Operand 18268 states and 21919 transitions. [2020-10-28 10:14:29,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-10-28 10:14:29,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:29,402 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:14:29,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 10:14:29,402 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:29,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:29,403 INFO L82 PathProgramCache]: Analyzing trace with hash 820432945, now seen corresponding path program 1 times [2020-10-28 10:14:29,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:29,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224793473] [2020-10-28 10:14:29,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:29,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:29,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:29,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:29,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:31,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:32,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:34,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:34,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-28 10:14:34,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 10:14:34,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5042 [2020-10-28 10:14:34,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:34,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:34,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:34,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 10:14:34,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 10:14:34,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:34,781 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:34,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:34,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:34,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:34,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:34,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:34,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 10:14:34,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:34,805 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:34,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:34,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:34,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:34,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:35,008 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 10:14:35,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:35,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:35,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:35,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 10:14:35,039 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:35,039 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 10:14:35,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:35,039 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:35,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:35,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:35,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 10:14:35,040 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:35,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 10:14:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:35,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:35,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:35,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 10:14:35,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:35,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-28 10:14:35,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:35,216 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:35,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:35,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:35,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 10:14:35,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:35,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-28 10:14:35,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:35,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:35,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:35,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 10:14:35,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:35,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 10:14:35,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:35,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:35,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:35,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 10:14:35,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:35,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:35,420 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 129 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 10:14:35,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224793473] [2020-10-28 10:14:35,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:35,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:14:35,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097941922] [2020-10-28 10:14:35,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:14:35,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:35,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:14:35,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:14:35,422 INFO L87 Difference]: Start difference. First operand 18268 states and 21919 transitions. Second operand 7 states. [2020-10-28 10:14:35,710 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:14:37,418 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 10:14:39,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:39,667 INFO L93 Difference]: Finished difference Result 43745 states and 54026 transitions. [2020-10-28 10:14:39,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:14:39,667 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 297 [2020-10-28 10:14:39,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:39,753 INFO L225 Difference]: With dead ends: 43745 [2020-10-28 10:14:39,753 INFO L226 Difference]: Without dead ends: 26141 [2020-10-28 10:14:39,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:14:39,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26141 states. [2020-10-28 10:14:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26141 to 25880. [2020-10-28 10:14:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25880 states. [2020-10-28 10:14:40,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25880 states to 25880 states and 30973 transitions. [2020-10-28 10:14:40,540 INFO L78 Accepts]: Start accepts. Automaton has 25880 states and 30973 transitions. Word has length 297 [2020-10-28 10:14:40,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:40,540 INFO L481 AbstractCegarLoop]: Abstraction has 25880 states and 30973 transitions. [2020-10-28 10:14:40,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:14:40,541 INFO L276 IsEmpty]: Start isEmpty. Operand 25880 states and 30973 transitions. [2020-10-28 10:14:40,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-10-28 10:14:40,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:40,580 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:14:40,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 10:14:40,581 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:40,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:40,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1894772753, now seen corresponding path program 1 times [2020-10-28 10:14:40,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:40,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364406572] [2020-10-28 10:14:40,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:40,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:40,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:43,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:45,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:45,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 344 [2020-10-28 10:14:45,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:14:45,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5099 [2020-10-28 10:14:45,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:45,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:45,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 10:14:45,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-28 10:14:45,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 282 [2020-10-28 10:14:45,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:46,177 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:46,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:46,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:46,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:46,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:46,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:46,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:14:46,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:46,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:46,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:46,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:46,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:46,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:46,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:46,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:46,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:46,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 10:14:46,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:46,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:14:46,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:46,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:46,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:14:46,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:46,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:14:46,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:46,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-28 10:14:46,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:46,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:46,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:46,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 10:14:46,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:46,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-28 10:14:46,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:46,391 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:46,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:46,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:46,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 10:14:46,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:46,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 10:14:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:46,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:46,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:46,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 10:14:46,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:46,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 289 [2020-10-28 10:14:46,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:46,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:46,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:46,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:46,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-28 10:14:46,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 82 proven. 110 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-28 10:14:46,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364406572] [2020-10-28 10:14:46,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:46,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 10:14:46,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73097951] [2020-10-28 10:14:46,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 10:14:46,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:46,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 10:14:46,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 10:14:46,922 INFO L87 Difference]: Start difference. First operand 25880 states and 30973 transitions. Second operand 6 states. [2020-10-28 10:14:47,345 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:14:50,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:14:50,642 INFO L93 Difference]: Finished difference Result 57904 states and 70888 transitions. [2020-10-28 10:14:50,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 10:14:50,643 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 328 [2020-10-28 10:14:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:14:50,756 INFO L225 Difference]: With dead ends: 57904 [2020-10-28 10:14:50,756 INFO L226 Difference]: Without dead ends: 32491 [2020-10-28 10:14:50,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 10:14:50,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32491 states. [2020-10-28 10:14:51,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32491 to 32100. [2020-10-28 10:14:51,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32100 states. [2020-10-28 10:14:51,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32100 states to 32100 states and 38095 transitions. [2020-10-28 10:14:51,645 INFO L78 Accepts]: Start accepts. Automaton has 32100 states and 38095 transitions. Word has length 328 [2020-10-28 10:14:51,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:14:51,646 INFO L481 AbstractCegarLoop]: Abstraction has 32100 states and 38095 transitions. [2020-10-28 10:14:51,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 10:14:51,647 INFO L276 IsEmpty]: Start isEmpty. Operand 32100 states and 38095 transitions. [2020-10-28 10:14:51,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-10-28 10:14:51,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:14:51,696 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:14:51,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 10:14:51,697 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:14:51,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:14:51,697 INFO L82 PathProgramCache]: Analyzing trace with hash -578558482, now seen corresponding path program 1 times [2020-10-28 10:14:51,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:14:51,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061421191] [2020-10-28 10:14:51,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:14:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:51,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:53,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:53,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:54,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:54,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 342 [2020-10-28 10:14:54,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:14:54,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3145 [2020-10-28 10:14:54,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:54,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:54,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 10:14:54,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-28 10:14:54,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 333 [2020-10-28 10:14:54,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:55,323 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:14:55,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:14:55,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:55,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:55,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:55,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:14:55,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:55,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 10:14:55,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:55,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:55,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:14:55,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:14:55,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 10:14:55,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:55,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:14:55,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:55,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:55,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:55,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 10:14:55,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:55,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-28 10:14:55,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:55,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:55,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:14:55,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:55,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-28 10:14:55,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:55,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-10-28 10:14:55,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:14:55,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:14:55,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:14:55,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 10:14:55,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:14:55,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-28 10:14:55,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:14:55,936 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:14:55,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 10:14:55,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:14:55,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 10:14:55,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:14:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 51 proven. 155 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 10:14:56,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061421191] [2020-10-28 10:14:56,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:14:56,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 10:14:56,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772965399] [2020-10-28 10:14:56,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 10:14:56,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:14:56,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 10:14:56,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 10:14:56,176 INFO L87 Difference]: Start difference. First operand 32100 states and 38095 transitions. Second operand 9 states. [2020-10-28 10:14:56,474 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 10:14:56,889 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:14:58,279 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:15:03,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:15:03,155 INFO L93 Difference]: Finished difference Result 84063 states and 105270 transitions. [2020-10-28 10:15:03,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 10:15:03,156 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 328 [2020-10-28 10:15:03,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:15:03,345 INFO L225 Difference]: With dead ends: 84063 [2020-10-28 10:15:03,345 INFO L226 Difference]: Without dead ends: 54405 [2020-10-28 10:15:03,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-28 10:15:03,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54405 states. [2020-10-28 10:15:04,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54405 to 52293. [2020-10-28 10:15:04,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52293 states. [2020-10-28 10:15:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52293 states to 52293 states and 63561 transitions. [2020-10-28 10:15:05,186 INFO L78 Accepts]: Start accepts. Automaton has 52293 states and 63561 transitions. Word has length 328 [2020-10-28 10:15:05,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:15:05,187 INFO L481 AbstractCegarLoop]: Abstraction has 52293 states and 63561 transitions. [2020-10-28 10:15:05,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 10:15:05,187 INFO L276 IsEmpty]: Start isEmpty. Operand 52293 states and 63561 transitions. [2020-10-28 10:15:05,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-28 10:15:05,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:15:05,257 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:15:05,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 10:15:05,258 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:15:05,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:15:05,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1936862048, now seen corresponding path program 1 times [2020-10-28 10:15:05,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:15:05,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882445230] [2020-10-28 10:15:05,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:15:05,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:05,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:05,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:05,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:06,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:10,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:10,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 349 [2020-10-28 10:15:10,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 10:15:10,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5077 [2020-10-28 10:15:10,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:10,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:10,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:10,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-28 10:15:10,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 10:15:10,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:10,693 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:15:10,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:15:10,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:10,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:10,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:10,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:15:10,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:10,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 10:15:10,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:10,710 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:10,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:10,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:10,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:10,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:10,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:15:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:10,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:10,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:10,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 10:15:10,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:10,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 10:15:10,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:10,832 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:10,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:10,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:10,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:10,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:10,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-28 10:15:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:10,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:10,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:10,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 10:15:10,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:10,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-28 10:15:10,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:10,887 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:10,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:15:10,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:10,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 10:15:10,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:10,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 10:15:10,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:10,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:11,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:11,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 10:15:11,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:11,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-28 10:15:11,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:11,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:11,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:11,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:15:11,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-28 10:15:11,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:11,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2020-10-28 10:15:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:11,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:11,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:11,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 10:15:11,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:11,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 10:15:11,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:11,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:11,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:11,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 10:15:11,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:11,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 200 proven. 37 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-28 10:15:11,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882445230] [2020-10-28 10:15:11,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:15:11,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:15:11,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532801601] [2020-10-28 10:15:11,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:15:11,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:15:11,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:15:11,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:15:11,497 INFO L87 Difference]: Start difference. First operand 52293 states and 63561 transitions. Second operand 7 states. [2020-10-28 10:15:12,017 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 10:15:13,200 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 10:15:16,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:15:16,701 INFO L93 Difference]: Finished difference Result 114530 states and 140308 transitions. [2020-10-28 10:15:16,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 10:15:16,702 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 331 [2020-10-28 10:15:16,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:15:16,956 INFO L225 Difference]: With dead ends: 114530 [2020-10-28 10:15:16,957 INFO L226 Difference]: Without dead ends: 63583 [2020-10-28 10:15:17,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-28 10:15:17,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63583 states. [2020-10-28 10:15:19,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63583 to 63353. [2020-10-28 10:15:19,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63353 states. [2020-10-28 10:15:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63353 states to 63353 states and 74071 transitions. [2020-10-28 10:15:19,410 INFO L78 Accepts]: Start accepts. Automaton has 63353 states and 74071 transitions. Word has length 331 [2020-10-28 10:15:19,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:15:19,410 INFO L481 AbstractCegarLoop]: Abstraction has 63353 states and 74071 transitions. [2020-10-28 10:15:19,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:15:19,410 INFO L276 IsEmpty]: Start isEmpty. Operand 63353 states and 74071 transitions. [2020-10-28 10:15:19,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-10-28 10:15:19,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:15:19,472 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:15:19,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 10:15:19,472 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:15:19,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:15:19,472 INFO L82 PathProgramCache]: Analyzing trace with hash 50902025, now seen corresponding path program 1 times [2020-10-28 10:15:19,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:15:19,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222932285] [2020-10-28 10:15:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:15:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:19,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:19,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:19,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:24,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:24,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 354 [2020-10-28 10:15:24,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:15:24,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-28 10:15:24,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:24,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:24,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:24,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-28 10:15:24,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 10:15:24,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:24,875 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:15:24,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:15:24,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:24,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:24,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:24,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:15:24,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:24,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:15:24,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:24,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:24,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:24,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:24,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:24,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:24,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:15:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:25,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:25,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:25,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 10:15:25,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:25,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 10:15:25,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:25,033 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:25,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:15:25,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:25,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 10:15:25,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:25,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-10-28 10:15:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:25,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:25,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:25,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 10:15:25,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:25,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-28 10:15:25,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:25,246 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:25,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:25,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:15:25,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 10:15:25,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:25,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-10-28 10:15:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:25,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:25,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:25,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 10:15:25,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:25,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 38 [2020-10-28 10:15:25,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:25,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:25,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:25,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-28 10:15:25,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:25,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 181 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-10-28 10:15:25,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222932285] [2020-10-28 10:15:25,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:15:25,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:15:25,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497926509] [2020-10-28 10:15:25,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:15:25,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:15:25,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:15:25,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:15:25,552 INFO L87 Difference]: Start difference. First operand 63353 states and 74071 transitions. Second operand 7 states. [2020-10-28 10:15:25,983 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 10:15:26,955 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 10:15:31,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 10:15:31,606 INFO L93 Difference]: Finished difference Result 131431 states and 160072 transitions. [2020-10-28 10:15:31,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 10:15:31,607 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 338 [2020-10-28 10:15:31,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 10:15:31,824 INFO L225 Difference]: With dead ends: 131431 [2020-10-28 10:15:31,825 INFO L226 Difference]: Without dead ends: 62859 [2020-10-28 10:15:31,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 10:15:32,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62859 states. [2020-10-28 10:15:33,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62859 to 54949. [2020-10-28 10:15:33,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54949 states. [2020-10-28 10:15:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54949 states to 54949 states and 62560 transitions. [2020-10-28 10:15:33,766 INFO L78 Accepts]: Start accepts. Automaton has 54949 states and 62560 transitions. Word has length 338 [2020-10-28 10:15:33,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 10:15:33,767 INFO L481 AbstractCegarLoop]: Abstraction has 54949 states and 62560 transitions. [2020-10-28 10:15:33,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 10:15:33,767 INFO L276 IsEmpty]: Start isEmpty. Operand 54949 states and 62560 transitions. [2020-10-28 10:15:33,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2020-10-28 10:15:33,802 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 10:15:33,803 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 10:15:33,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 10:15:33,803 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 10:15:33,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 10:15:33,803 INFO L82 PathProgramCache]: Analyzing trace with hash -565038203, now seen corresponding path program 1 times [2020-10-28 10:15:33,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 10:15:33,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062050012] [2020-10-28 10:15:33,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 10:15:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:33,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:34,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:35,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:38,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:38,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 368 [2020-10-28 10:15:38,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 10:15:38,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 10:15:38,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:38,914 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:38,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:38,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 10:15:38,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-28 10:15:38,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:39,219 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 10:15:39,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 10:15:39,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:39,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:39,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:39,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 10:15:39,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:39,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 10:15:39,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:39,231 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:39,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:39,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:39,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:39,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:39,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-28 10:15:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:39,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:39,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:39,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 10:15:39,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:39,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-28 10:15:39,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:39,409 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:39,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 10:15:39,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 10:15:39,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 10:15:39,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:39,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 10:15:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:39,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:39,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:39,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 10:15:39,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:39,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-10-28 10:15:39,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:39,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:39,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 10:15:39,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 10:15:39,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-28 10:15:39,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:39,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-10-28 10:15:39,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 10:15:39,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 10:15:39,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 10:15:39,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 10:15:39,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 10:15:39,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-28 10:15:39,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 10:15:39,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 10:15:39,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 10:15:39,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-28 10:15:39,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 10:15:39,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 10:15:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 209 proven. 57 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-28 10:15:39,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062050012] [2020-10-28 10:15:39,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 10:15:39,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 10:15:39,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253190276] [2020-10-28 10:15:39,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 10:15:39,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 10:15:39,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 10:15:39,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-28 10:15:39,987 INFO L87 Difference]: Start difference. First operand 54949 states and 62560 transitions. Second operand 7 states. [2020-10-28 10:15:40,313 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification that was a NOOP. DAG size: 164